Finding the Fourth Proportional to 3,499.52, 5,239.20 and 3,149.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,499.52 : 5,239.20 = 3,149.60 : x
2. Step 2: Convert to fraction form
   3,499.52/5,239.20 = 3,149.60/x
3. Step 3: Cross multiply
   3,499.52x = 5,239.20 × 3,149.60
4. Step 4: Simplify right side
   3,499.52x = 16,501,384.32
5. Step 5: Solve for x
   x = 16,501,384.32/3,499.52
6. Step 6: Final answer
   x = 4,715.33